660538368 has 176 divisors, whose sum is σ = 2236306560. Its totient is φ = 188669952.

The previous prime is 660538367. The next prime is 660538391. The reversal of 660538368 is 863835066.

660538368 is a `hidden beast` number, since 6 + 605 + 3 + 8 + 36 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (660538367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191830 + ... + 195242.

Almost surely, 2^660538368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660538368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1118153280).

660538368 is an abundant number, since it is smaller than the sum of its proper divisors (1575768192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660538368 is a wasteful number, since it uses less digits than its factorization.

660538368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449 (or 3425 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 660538368 is about 25700.9409944461. The cubic root of 660538368 is about 870.8954395353.

The spelling of 660538368 in words is "six hundred sixty million, five hundred thirty-eight thousand, three hundred sixty-eight".